import { describe, expect, it } from 'vitest';
import { buildPier } from '../src/core/geometry';
import { solplateGeometry } from '../src/core/solplate';
import { SOLPLATE_RULE_DEFAULT, solplatePlan } from '../src/core/solplate-rule';
import { loadP1 } from './helpers';

const model = buildPier(loadP1());
const front1 = model.blocks.filter((b) => b.row === '전열')[0];
const plan = solplatePlan(SOLPLATE_RULE_DEFAULT);

describe('솔플레이트 기하 (C안, 2026-11-03)', () => {
  it('L = 교직 1000 across the 교각축 직각 (n) and W = 교축 1100 along the 교축 (s)', () => {
    const g = solplateGeometry(front1, plan);
    expect(g.L).toBeCloseTo(1.0, 6);
    expect(g.W).toBeCloseTo(1.1, 6);
  });

  it('the thick end T1 is on the (−) side: T1 = 27.5 mm, T2 = 22.5 mm, and T1 + T2 = 2T', () => {
    const g = solplateGeometry(front1, plan);
    expect(g.T1 * 1000).toBeCloseTo(27.5, 6);
    expect(g.T2 * 1000).toBeCloseTo(22.5, 6);
    expect((g.T1 + g.T2) * 1000).toBeCloseTo(50, 6);
    // The top at the (−) corners is the thick side.
    const topAtStart = g.corners.filter((c) => Math.abs(c[1] - (g.bottom + g.T1)) < 1e-9);
    expect(topAtStart.length).toBe(2);
  });

  it('the underside is the bearing top: block top (EL.X) + h3 (186 mm)', () => {
    const g = solplateGeometry(front1, plan);
    expect(g.bottom).toBeCloseTo(front1.padTop + 0.186, 6);
  });

  it('volume = L·W·T (the taper averages to the centre thickness)', () => {
    const g = solplateGeometry(front1, plan);
    expect(g.volume).toBeCloseTo(g.L * g.W * 0.025, 9);
  });

  it('the solplate is centred on the block and follows the row direction', () => {
    const g = solplateGeometry(front1, plan);
    const c = g.corners.reduce((acc, p) => [acc[0] + p[0] / 8, acc[1] + p[2] / 8] as [number, number], [0, 0]);
    expect(c[0]).toBeCloseTo(front1.s, 6);
    expect(c[1]).toBeCloseTo(front1.n, 6);
  });
});